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DC-DC converters simplify power systems for space RF equipment

Fri, 07/12/2013 - 3:14pm

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International Rectifier introduced the radiation hardened ML Series dual output DC-DC power converter platform designed for RF communication equipment such as low noise amplifiers (LNA), receivers and frequency converters used onboard satellites.

IR’s ML Series features output sequencing typically required by RF-circuitries and isolated telemetry/telecommand for compliant satellite telemetry/telecommand systems without the need for additional components. Other key design features include integrated input EMI filter compliant to most major satellite power buses, radiation hardness of 100 Krad (TID) and 82MeV∙cm2/mg (SEE) and output voltage accuracy to ±2% at worst case end of life. The platform also offers extremely low output ripple/noise of less than 0.5Vrms (50Hz to 50MHz), excellent input to outputs CS rejection greater than 90dB, and input under-voltage lock-out (UVLO) with optional latching or with automatic restart.

Specifications

 

Parameter

Performance

Electrical

Input DC-Bus Voltage

Input: Adaptable to operate with 28V to 100V power buses

 

Input Under Voltage Protection

Automatic shutdown if input drops below a threshold.
Auto restart or UVP latch is possible. ±1V hysteresis

Output 1

Configurable +1.5V to +15V, 4W or 500mA maximum

 

Output 2

Configurable -1.5V to -15V, 1W or 100mA maximum

 

Output Sequencing

Output Sequencing: Output 2 is the priority output. It is designed to establish itself prior to Output 1 turning on when the EPC is powered up or commanded on. Output 2 will remain ON while Output 1 is decaying toward zero when the EPC is powered down or commanded OFF. In case of an overload at output 2, output 1 is shut-down immediately.

Mechanical Properties

Size

50mm x 70mm x 17.8mm

Mass

<50grams, typical

More information is available on the International Rectifier website at www.irf.com.

Availability and pricing
Pricing for the ML Series begins at $22,000 each in low-unit quantities. Production orders are available immediately. Prices are subject to change. This product is subject to U.S. export control laws and regulations, including but not limited to the US International Traffic in Arms Regulations (ITAR) and the Export Administration Regulations (EAR).

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